Meteoritical Bulletin: Entry for Northwest Africa 14538

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Northwest Africa 14538

Basic information

Name: Northwest Africa 14538
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14538
Observed fall: No
Year found: 2018
Country: Morocco
Mass: 30 g

Classification
history:

Recommended:

Eucrite [explanation]

This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 22 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 14538 (NWA 14538)

Morocco

Find: 2018

Classification: HED achondrite (Eucrite)

Petrography: (J. Gattacceca, CEREGE) Igneous rock with microgabbroic texture. Typical grain size 400 µm. Main minerals are pyroxene and plagioclase. Low-Ca pyroxene has augite exsolution with a clear dichotomy in exsolution width (20 µm and <1 µm). Accessory troilite, chromite, ilmenite, silica polymorph, metal.

Geochemistry: Low-Ca pyroxene Fs_60.1±0.7Wo_2.4±0.3, FeO/MnO 30.9±1.5 (n=4). Augite exsolutions Fs_27.7±1.2Wo_42.5±1.3(n=3). Plagioclase An_89.2±0.3Ab_10.5±0.2Or_0.3±0.1(n=4).

Classification: Achondrite (eucrite)

Specimens: Type specimen at CEREGE. Main mass with Jimmy Pizarro.

Data from:
  MB110
  Table 0
  Line 0:

Date:	2018
Mass (g):	30
Pieces:	1
Class:	Eucrite
Weathering grade:	moderate
Ferrosilite (mol%):	60.1±0.7 (n=4)
Wollastonite (mol%):	2.4±0.3
Magnetic suscept.:	3.57
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	6.3
Type spec location:	CEREGE
Main mass:	Jimmy Pizarro
Finder:	anonymous
Comments:	work name PIZ11; submitted by Jérôme Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1837 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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